logstash的部署和使用

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本文详细介绍了如何使用Logstash收集由Log4j产生的日志，并将其存储至Elasticsearch中。步骤包括下载Logstash、修改配置文件、启动Logstash服务、配置Log4j以发送日志至Logstash，以及通过Java代码进行日志记录。

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1、下载logstash

https://www.elastic.co/downloads/elasticsearch

2、修改配置

   cd config
   vim log4j_es.conf
   
    input {
        log4j {
            host => "127.0.0.1"
            port => 4560
        }
    }
    output {
        stdout {
          codec => rubydebug
        }
        elasticsearch{
            hosts => ["localhost:9200"]
            index => "log4j-%{+YYYY.MM.dd}"
            document_type => "log4j_type"
        }
    }

’3、启动logstash

./bin/logstash -f config/log4j_es.conf

4. Log4j记录日志到Logstash

4-1) 新建maven项目

pom中的关键dependency配置如下：

<dependency>
    <groupId>log4j</groupId>
    <artifactId>log4j</artifactId>
    <version>1.2.17</version>
</dependency>

4-2) log4j.properties(放在resources文件夹下)

### 设置###
log4j.rootLogger = debug,stdout,D,E,logstash

### 输出信息到控制抬 ###
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target = System.out
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern = [%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} method:%l%n%m%n

### 输出DEBUG 级别以上的日志到=/Users/bee/Documents/elk/log4j/debug.log###
log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.File = /Users/KG/Documents/logs/elk/debug.log
log4j.appender.D.Append = true
log4j.appender.D.Threshold = DEBUG
log4j.appender.D.layout = org.apache.log4j.PatternLayout
log4j.appender.D.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n

### 输出ERROR 级别以上的日志到=/Users/bee/Documents/elk/log4j/error.log  ###
log4j.appender.E = org.apache.log4j.DailyRollingFileAppender
log4j.appender.E.File =/Users/KG/Documents/logs/elk/error.log
log4j.appender.E.Append = true
log4j.appender.E.Threshold = ERROR
log4j.appender.E.layout = org.apache.log4j.PatternLayout
log4j.appender.E.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n

#输出日志到logstash
log4j.appender.logstash=org.apache.log4j.net.SocketAppender
log4j.appender.logstash.RemoteHost=127.0.0.1
log4j.appender.logstash.port=4560
log4j.appender.logstash.ReconnectionDelay=60000
log4j.appender.logstash.LocationInfo=true

4-3) Java代码(ElkLog4jTest.java)：

package org.genesis.arena.elk;

import org.apache.log4j.Logger;

/**
 * Created by KG on 17/3/27.
 */
public class ElkLog4jTest {
    private static final Logger logger = Logger.getLogger(ElkLog4jTest.class);
    public static void main(String[] args) throws Exception {
        logger.debug("This is a debug message!");
        logger.info("This is info message!");
        logger.warn("This is a warn message!");
        logger.error("This is error message!");

        try{
            System.out.println(5/0);
        }catch(Exception e){
            logger.error(e);
        }
    }
}

5、展示效果